All of these discoveries provide scientists with information both on the earth's history in general and on the area ground of the Grand Canyon in particular.

所有这些发现为科学家们提供了关于宏观地球历史以及微观大峡谷地貌的信息。

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Colorado River cut the Colorado Plateau into 19 main canyon, with a total area of 2,724.7 square kilometers. The deepest, widest and longest one is the Grand canyon of the Colorado.

科罗拉多河在科罗拉多高原上共切割出19条主要峡谷，总面积2724.7平方公里，其中最深、最宽、最长的一个就是科罗拉多大峡谷。

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The tribe says the area, called Grand Canyon West, will include a large visitors' center, restaurants, and possibly hotels in the future.

VOA: special.2009.10.07